Ordnance handling device

ABSTRACT

The invention disclosed herein relates to a lifting member and more specifically to an extendable type horizontal lifting bar adapted for adjustment by a pair of slidable telescoping members and a unique clamping device for rigidly affixing them in individual positions for adjustment to maintain a load to be lifted in a horizontal position at all times.

United States Patent [191 Brown Jan. 29, 1974 [54] ()RDNANCE HANDLINGDEVICE 1,603,421 10/1926 Shaffer 294/67 E X [75] Inventor: Malcolm B.Brown, Oreland, Pa. FOREIGN PATENTS OR APPLICATIONS 73 Assignee: TheUnited states of America as 1,480,384 5/1967 France 294/81 R representedby the Secretary of the 1,439,248 12/1966 France 294/81 R Navy,Washington, DC Primary Examiner-Evon C. Blunk [22] Flled: June 1972Assistant Examiner-Johnny D. Cherry [21] Appl. No.: 265,084 Attorney,Agent, or Firm-R. S. Sciascia; R. J. Miller 52 US. Cl. 294/81 R, 294/67R [57] t ABSHMQT 511 Int. Cl. B66c 1/12 The lnventwn disclose-Ql heremrelates to a llftmg [58] Field of Search 294/67 R, 67 AA, 67 B, memberand more speclfically to an extendable yp 9 7 BB, 7 D A 7 E 7 81 R 3 51:horizontal lifting bar adapted for adjustment by a pair of slidabletelescoping members and a unique clamp- [56] References Cited ing devicefor rigidly affixing them in individual posi- UNITED STATES PATENTStions for adjustment to maintain a load to be lifted in a horizontalposition at all times. 3,076,673 2/1963 Kaplan et al 294/85 3,601,4408/1971 Evans 294/81 R X 7 Claims, 5 Drawing Figures 7 '-1 5 I I I LQ 1 2J- l n l I 'rgn-65 s q l 23 q, 2 3 ,j 4 s 64 24 ORDNANCE HANDLING DEVICEThe invention described herein may be manufactured and used by and forthe Government of the United States of America for governmental purposeswithout the payment of any royalties thereon or therefor.

Ever since man has had loads to be lifted greater than his owncapabilities to lift, he has utilized lifting devices to achieve hisdesired purpose. The art is old in lifting devices and it is only withthe advent of new types of problems that new devices are often timesdeveloped.

When lifting a load from one position to another it is often necessaryto maintain that load in a horizontal position and at the same time liftsuch a load. An individual load whose center of gravity does notcorrespond to its center of moment may be lifted in a horizontalposition.

Towards this end this invention is directed.

Further, the lifting device must be compatible with existing equipmentand must be packaged for easy shipment, and in addition, they should beruggedly designed and be interchangeable so that they may be repaired inthe field quickly with a minimum of spare parts and labor.

It is therefore an object of this invention to provide an improvedhorizontal lifting device.

It is a further object of this invention to provide an improvedhorizontal lifting device having a central portion, two telescoping endmembers, two or more clamping members positioned for applyingcompressing force to rigidly affix, by friction, the telescoping memberswithin the adjustable predetermined position in the housing member.

It is a further objective of this invention to provide an improvedlifting member capable of adjustment by slidable position, twotelescoping members within a housing member and providing an improvedclamping method consisting of two plate members opposite positioned onfaces of housing member and having sloping face portions contacting thehousing member and connected by a fastening member capable of drawingthe two plate members together and applying pressure to the housingmember forcing it into a tight, friction fit with the telescopingmembers thereby rigidly affixing the telescoping members within a presetposition in the housing member.

Other objects, advantages and novel features of the invention willbecome apparent from the following detailed description of the inventionwhen considered in conjunction with the accompanying drawing wherein:

FIG. 1 is an overall view of the device.

FIG. 2 is a section view along lines 2-2 in FIG. 1.

FIG. 3 is a section view along lines 33 in FIG. 1.

FIG. 4 is a section view along lines 4-4 in FIG. 1.

FIG. 5 is a section view along lines 55 in FIG. 1.

The telescopic beam or strong back consists of a central member andextendable members 21 and 22. Extending from telescopic members 21, 22are shown cables 23, 24 connecting to the load 11 for lifting. A beamhanger lug 25, connected to member 20 is provided for suspension from acrane, not shown. First and second clamp members 30, 31 are shown, oneon either side of the hanger lug, and their purpose is to holdtelescopic members 21, 22 in a fixed relationship to beam 10 after theirlength has been selected for lifting a given load. It should be noted itis not necessary to extend members 21, 22 equally, but rather they maybe extended unequally so that the load is maintained in a substantiallyhorizontal position regardless of the distribution of weight within load11.

FIG. 2 shows central beam 20 to consist of a first channel member 35 anda second channel member 36 spaced apart and held in a rigid position bybrace plates 37 and 38. Clamp member 30 and hanger lug 25 are alsoshown.

FIG. 3, the view along lines 33 of FIG. 1, shows the telescopic beammember 22 to be composed of a first channel member 40 and a secondchannel member 41 spaced apart and rigidly held that way by brace plates42, 43.

FIG. 4 shows the details of clamp member 31 to include a first clampplate 50 and a second clamp plate 51 having sloping faces 52, 53, 54,and 55. A centrally disposed bolt 60 is rigidly affixed to clamp plate50 and passes thru a hole 61 in clamp plate 51. The lower end of bolt 60is a threaded portion mounted thereto as a wing nut 64.

FIG. 5, a view along lines 5-5 in FIG. 1, shows telescoping beam 22 tohave a cable holding member 70 to hold cable 24 which is rigidly affixedto the end of telescoping beam 22.

In operation, the desired extension of telescoping beams 21 and 22 isobtained, and wing nuts 64 and 65 are tightened, drawing first clampmember 50 and second clamp member 51 towards each other causing thesloping faces 52, 53, 54 and 55, to force the channel members 35, 36inward against channel members 40, 41 and thus causing a tight frictionfit between beam 20 and telescopic beams 21, 22. The forces and frictionare such that under load conditions, beams 21, 22 may not slide withinbeam member 20.

Obviously many modifications and variations of the present invention arepossible in the light of the above teachings. It is therefore to beunderstood that within the scope of the appended claims the inventionmay be practiced otherwise than as specifically described.

I claim:

1. An improved lifting member comprising:

a. a body member consisting of first and second longitudinal membersrigidly attached to each other having formed therebetween first andsecond longitudinal slots;

b. a first extendable member consisting of third and fourth longitudinalmembers rigidly affixed to each other and spaced from each other to formthird and fourth longitudinal slots therebetween;

c. a second extendable member consisting of fifth and sixth longitudinalmembers rigidly affixed to each other and spaced from each other to formfifth and sixth longitudinal slots therebetween;

d. a first clamping means positioned on said body member having firstand second positions, said first position allowing said first extendablemember to move within said body member and in said second position saidfirst extendable member is held by friction in a preset position; and

e. a second clamping means positioned on said body member having firstand second positions, said first position allowing said secondextendable member to move within said body member and in said secndposition said second extendable member is held by friction in a presetposition.

2. The improved lifting member of claim 1 wherein there is provided acentrally disposed hanger lug mounted on said body member.

3. The device of claim 2 wherein said first and second longitudinalmembers of said body member is channel shaped.

4. The device of claim 3 wherein said third, fourth, fifth and sixthlongitudinal members of said first and second extendable members arechannel shaped.

5. The device of claim 4 wherein said first clamping means include afirst plate attached to a connecting member, said connecting memberextending thru said first, third, fourth and second longitudinal slotsand a second plate member, a threaded nut member positioned to draw saidfirst and second plate members together to cause a friction fit betweensaid body member and said first extendable member.

6. The device of claim 5 wherein said second clamping means include afirst plate attached to a threaded connecting member, said connectingmember extending thru said first, fifth, sixth and second longitudinalslots and a second plate member, a threaded nut member positioned todraw said first and second plate members together to cause a frictionfit between said body member and said second extendable member.

7. The device of claim 6 wherein first and second suspension meansaffixed to said first and second extendable members for connecting to aload to be lifted.

1. An improved lifting member comprising: a. a body member consisting offirst and second longitudinal members rigidly attached to each otherhaving formed therebetween first and second longitudinal slots; b. afirst extendable member consisting of third and fourth longitudinalmembers rigidly affixed to each other and spaced from each other to formthird and fourth longitudinal slots therebetween; c. a second extendablemember consisting of fifth and sixth longitudinal members rigidlyaffixed to each other and spaced from each other to form fifth and sixthlongitudinal slots therebetween; d. a first clamping means positioned onsaid body member having first and second positions, said first positionallowing said first extendable member to move within said body memberand in said second position said first extendable member is held byfriction in a preset position; and e. a second clamping means positionedon said body member having first and second positions, said firstposition allowing said second extendable member to move within said bodymember and in said second position said second extendable member is heldby friction in a preset position.
 2. The improved lifting member ofclaim 1 wherein there is provided a centrally disposed hanger lugmounted on said body member.
 3. The device of claim 2 wherein said firstand second longitudinal members of said body member is channel shaped.4. The device of claim 3 wherein said third, fourth, fifth and sixthlongitudinal members of said first and second extendable members arechannel shaped.
 5. The device of claim 4 wherein said first clampingmeans include a first plate attached to a connecting member, saidconnectiNg member extending thru said first, third, fourth and secondlongitudinal slots and a second plate member, a threaded nut memberpositioned to draw said first and second plate members together to causea friction fit between said body member and said first extendablemember.
 6. The device of claim 5 wherein said second clamping meansinclude a first plate attached to a threaded connecting member, saidconnecting member extending thru said first, fifth, sixth and secondlongitudinal slots and a second plate member, a threaded nut memberpositioned to draw said first and second plate members together to causea friction fit between said body member and said second extendablemember.
 7. The device of claim 6 wherein first and second suspensionmeans affixed to said first and second extendable members for connectingto a load to be lifted.